Pusher Channels

Pusher Channels MCP Server

An MCP (Model Context Protocol) server that gives AI agents the ability to send realtime messages, query channels, and manage users through Pusher Channels.

Tools

| Tool | Description | |------|-------------| | trigger_event | Send an event to one or more channels | | trigger_batch_events | Send up to 10 events in a single API call | | list_channels | List active channels with optional prefix filter | | get_channel_info | Get subscription/user count for a channel | | get_presence_users | List users connected to a presence channel | | authorize_channel | Generate auth tokens for private/presence channels | | terminate_user_connections | Disconnect all connections for a user |

Prerequisites

• Node.js 18 or later
• A Pusher Channels account (free tier available)

Installation

npm install -g @crashbytes/pusher-mcp-server

Or clone and build from source:

git clone https://github.com/CrashBytes/pusher-mcp-server.git
cd pusher-mcp-server
npm install
npm run build

Configuration

You need four environment variables from your Pusher dashboard:

| Variable | Description | |----------|-------------| | PUSHER_APP_ID | Your Pusher app ID | | PUSHER_KEY | Your Pusher app key | | PUSHER_SECRET | Your Pusher app secret | | PUSHER_CLUSTER | Your Pusher cluster (e.g. us2, eu, ap1) |

Usage with Claude Desktop

Add the following to your Claude Desktop config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "pusher": {
      "command": "node",
      "args": ["/path/to/pusher-mcp-server/build/index.js"],
      "env": {
        "PUSHER_APP_ID": "your_app_id",
        "PUSHER_KEY": "your_app_key",
        "PUSHER_SECRET": "your_app_secret",
        "PUSHER_CLUSTER": "us2"
      }
    }
  }
}

If installed globally via npm:

{
  "mcpServers": {
    "pusher": {
      "command": "pusher-mcp-server",
      "env": {
        "PUSHER_APP_ID": "your_app_id",
        "PUSHER_KEY": "your_app_key",
        "PUSHER_SECRET": "your_app_secret",
        "PUSHER_CLUSTER": "us2"
      }
    }
  }
}

Usage with Claude Code

claude mcp add pusher -- node /path/to/pusher-mcp-server/build/index.js

Set the environment variables in your shell before running, or configure them in your Claude Code MCP settings.

Example Prompts

Once configured, you can ask Claude things like:

• "Send a 'deploy-complete' event to the notifications channel with the message 'v2.1.0 deployed'"
• "Show me all active presence channels"
• "How many users are on the presence-lobby channel?"
• "Disconnect user abc123 from all channels"

Development

npm install
npm run dev          # Run with tsx (hot reload)
npm run build        # Compile TypeScript
npm run type-check   # Check types without emitting

Tutorial

For a step-by-step guide on building this server from scratch, see the full tutorial on CrashBytes.

License

MIT